20187552798 has 48 divisors (see below), whose sum is σ = 49996473696. Its totient is φ = 5766920640.

The previous prime is 20187552793. The next prime is 20187552799. The reversal of 20187552798 is 89725578102.

20187552798 is a `hidden beast` number, since 2 + 0 + 1 + 87 + 552 + 7 + 9 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20187552793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1177528 + ... + 1194548.

It is an arithmetic number, because the mean of its divisors is an integer number (1041593202).

Almost surely, 2^20187552798 is an apocalyptic number.

20187552798 is an abundant number, since it is smaller than the sum of its proper divisors (29808920898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20187552798 is a wasteful number, since it uses less digits than its factorization.

20187552798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26449 (or 26446 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

It can be divided in two parts, 20187 and 552798, that added together give a triangular number (572985 = T₁₀₇₀).

The spelling of 20187552798 in words is "twenty billion, one hundred eighty-seven million, five hundred fifty-two thousand, seven hundred ninety-eight".